Cita APA (7th ed.)
Langan, J. (2008). College Writing Skills with Readings (7th ed.). McGraw Hill.
Cita Chicago (17th ed.)
Langan, John. College Writing Skills with Readings. 7th ed. New York: McGraw Hill, 2008.
Cita MLA (9th ed.)
Langan, John. College Writing Skills with Readings. 7th ed. McGraw Hill, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.